Normal sudoku rules apply. Cells separated by a single knight's move (in chess) cannot contain the same digit. In each positive diagonal (ie diagonal sloping from the South-West to the North-East), neighbouring digits differ by only 1 or 8.
Normal sudoku rules apply. Cells separated by a single knight's move (in chess) cannot contain the same digit. In each positive diagonal (ie diagonal sloping from the South-West to the North-East), neighbouring digits differ by only 1 or 8.